MDCAT Chemistry MCQ #5110

If a reaction mechanism involves a step with a very high activation energy (Ea), what can be inferred about that reaction?

MDCAT Chemistry MCQ #5110

  1. Question 1

    Q1. If a reaction mechanism involves a step with a very high activation energy (Ea), what can be inferred about that reaction?

    • A) The reaction will be extremely fast
    • B) The reaction will be exothermic
    • C) The reaction will be slow at room temperature
    • D) The reaction will have a high molecularity

    Answer: The reaction will be slow at room temperature

    Explanation: Large Ea means a steep energy barrier and slower rate. Option D is wrong because Ea is the barrier, not the total energy.